$color:transparent;
body{
    background-color: $color;
    //禁用文字选中
    user-select: none;
}
img{
    //禁止图片拖动
    -webkit-user-drag: none;
}
.demo-logo-vertical{
    height: 32px;
    margin: 16px;
    background: rgba(255,255,225,0.3);
}
